对于使用电池的多轴旋翼机来说，以下哪种充电方法是错误的（）

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问题单项选择题

A.LiPo每芯充至4.6V满电

B.LiPo每芯充至4.2V满电

C.LiFe每芯充至3.6V满电

答案

参考答案：A

单项选择题

急性心肌梗死与心绞痛的主要鉴别点是

A．疼痛的部位
B．疼痛的性质
C．是否伴有多源性期前收缩
D．是否伴有ST段抬高
E．肌酸磷酸激酶同工酶升高

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单项选择题

A project management technique that is currently in widespread use is the (66) . The purpose of this technique is to detail, in hierarchical fashion, all of the activities that are required to meet project objectives. There are some special activities called (67) , which are events that signify the accomplishment or completion of major deliverables during the project. Most system development methodologies also provide (68) , whose purpose is to contain the various pieces of relevant information - feasibility assessments, schedules, needs analysis, and so forth - in a single place so that they can be presented to project clients and other related parties. Several types of important network diagrams are used in project management. (69) was developed to make clear the interdependence between project tasks before those tasks are scheduled. (70) offers the advantage of clearly showing overlapping tasks.

A. feasibility checkpoints B. phases
C. iterations D. milestones

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